RAYNHAM – The first bomb shattered the front glass, sending shards throughout the Marathon Sports store.

Soon, there was blood, bodies and employees ripping clothing from displays to use as tourniquets for the wounded just outside the Boylston Street store.

The store, just feet from the Boston Marathon finish line, is managed by Raynham resident Shane O’Hara. Although O’Hara says he doesn’t like revisiting what happened that day, he would do it all over again if needed.

“We did what we did and we would do it again,” said O’Hara, 43, who has managed the store for more than a decade.

This year, he won’t be in the store – at least until after the marathon – because he plans to run it.

O’Hara was inspired to run after the horrifying events of last year’s terrorist attack that killed three and left more than 200 wounded.

He is hoping when he finishes, he will be able to start putting the events of last year behind him.

“Coming by the memorial sites and then finishing, I can say it’s behind me and I’m just going to go forward,” he said while in his store Thursday. “I’m sure I’m going to be whacked with emotions right there. It will be all happy, joyous. You’ll think of the ones that were lost and I’ve gotten to know one family fairly well with that, and you’ll think of that and say they’re looking down on you.”

As he talked, his eyes welled up with tears.

“You try to think of that when you’re out doing your runs and so many different things go on through your head. I just hope I don’t cramp up and fall down before I finish because that would be the biggest thing that I hope doesn’t happen to me.”

The last time O’Hara ran the Boston Marathon was in 1999. It was his first marathon.

One of the first memories he has is of girls screaming at Wellesley College.

“Goosebumps just started running up my arms and you’ve got to contain yourself to not get too hyped up from the crowd like that,” he said.

O’Hara has been the manager at Marathon Sports on Boylston Street since it opened in 2001. He is expecting the crowds this year to be the biggest the race, in its 118th iteration, has seen.

“Everyone claims that they have the best fans in their city but this year, we will claim that we’ve got the best running fans by far,” O’Hara said. “I think we’re going to just have hoards of people out there. It’s going to be insane.”

Page 2 of 2 - O’Hara decided he wanted to run in August and has been training ever since. He has run the 26.2-mile course four times in preparation.

“You do it to get re-familiarized with the hills and feel where they are and know where they are,” he said. “You just say to yourself, ‘C’mon you did these hills every week, this is nothing.’ You know them like the back of your hand.”

He has a nagging leg injury that he is hoping will not hamper his run.

“I’m just going to rub the heck out of it and ice it and pray that it feels good starting out. In all of my long runs, I’ve been able to finish them. It just goes numb,” he said.

When he said he wanted to put the events of last year behind him, he wanted to clarify that it didn’t mean he wanted to forget about what happened.

“I heard people walking by last night and saying ‘Oh, that’s that store,’” he said. “It’s one of those things where some people are going to walk by and they’re not going to remember five years from now or 10 years from now.

“For me, it will never do that. Four-15 will always be a number just like 9/11 to me,” said O’Hara. “I want people to stop more and think that there’s still probably somebody that is struggling with a prosthetic leg and their whole entire life has completely changed. And that changed their family’s lifestyle. I don’t want that to ever be forgotten. I’d like to move on and give the people the support.

“Don’t forget about them now after one year because they’re going to need it six years from now.”